Electronic clock



FIG. 1 is a front elevational view of an electronic clock showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a typical end elevational view thereof. 

The ornamental design for an electronic clock, as shown and described. 